Add AID export: OpenAPI from api-format and app generator bundle

Nest: POST /aid/export/openapi, POST /aid/export/app. Tools: api-format-to-openapi CLI. Generator: --print-bundle-json. Optional env: AID_EXPORT_API_KEY, AID_GENERATOR_ALLOW_APPLY.

server/src/aid-export/aid-export.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { AidExportController } from './aid-export.controller';
+import { AidExportService } from './aid-export.service';
+
+@Module({
+  controllers: [AidExportController],
+  providers: [AidExportService],
+})
+export class AidExportModule {}